Abstract: The present disclosure provides a system for intercepting a rogue drone, the system comprising: a broad-angle electromagnetic radiation emitter for illuminating a cone of sky with coded electromagnetic radiation; and an air vehicle. The air vehicle comprises: an electromagnetic radiation detector for receiving coded electromagnetic radiation reflected from a rogue drone operating in the cone of sky, the detector comprising a notch filter for selecting the coded electromagnetic radiation and for disregarding light from other sources; and a controller for determining the position of the rogue drone based on the received coded electromagnetic radiation. The present invention also provides an air vehicle for intercepting a rogue drone and a method of intercepting a rogue drone.

Abstract: There is provided a thermal management apparatus for use with a vehicle comprising: a chassis in thermal contact with one or more first components that require thermal management and one or more second components that require thermal management, wherein the chassis is configured to transfer heat from the one or more first components to the one or more second components.

Abstract: There is provided a thermal management apparatus for use with a vehicle comprising: a chassis in thermal contact with one or more first components that require thermal management and one or more second components that require thermal management, wherein the chassis is configured to transfer heat from the one or more first components to the one or more second components.

Abstract: A method of authenticating an entity comprises generating, at a one-time pad authenticator associated with a user, a first code corresponding to a first part of a first one-time pad stored on the one-time pad authenticator, the first point having a starting address within the first-one time pad. The method comprises transmitting, from a user device to the entity, a request for the entity to authenticate itself, the request comprising the starting address. In response to receiving the request, the method comprises generating, by the entity, a second code corresponding to the first part of a second one-time pad stored on the entity, wherein the first part of the second one-time pad is determined using the received starting address. The method further comprises transmitting the second code to the user device; and receiving, at the user device, the second code for comparison with the first code, wherein, if the first code is equal to the second code, the entity is authenticated.

Abstract: A mobile communications network comprising a plurality of nodes, each node being disposed on a vehicle, wherein the plurality of nodes are configured to be connected to any one or more of a plurality of mobile devices, and the mobile communications network further comprising a planning and control module configured to: receive or obtain first location data representative of a first location of at least one of the plurality of mobile devices and receive, periodically or otherwise, respective updated location data representative of the current location of the respective mobile devices; receive, periodically or otherwise, second data from each of the nodes, the second data being representative of the respective coverage capability of the nodes; receive data representative of a coverage requirement associated with a specified one or more of the mobile devices; and generate, using the updated location data and the second data, an output to cause the coverage capability of one or more of the nodes to be adjusted

Abstract: A mobile communications network comprising a plurality of nodes, each node being disposed on a vehicle, wherein the plurality of nodes are configured to be connected to any one or more of a plurality of mobile devices, and the mobile communications network further comprising a planning and control module configured to: receive or obtain first location data representative of a first location of at least one of the plurality of mobile devices and receive, periodically or otherwise, respective updated location data representative of the current location of the respective mobile devices; receive, periodically or otherwise, second data from each of the nodes, the second data being representative of the respective coverage capability of the nodes; receive data representative of a coverage requirement associated with a specified one or more of the mobile devices; and generate, using the updated location data and the second data, an output to cause the coverage capability of one or more of the nodes to be adjusted

Abstract: A method is disclosed of applying a non-secure warning tone to a packetized voice signal which includes receiving a voice signal containing a sequence of voice samples; providing a non-secure warning tone signal containing a plurality of tone samples; and modifying the voice signal by selectively including tone samples in the sequence of voice samples.

Abstract: A network management assembly is disclosed for managing a flow of network management traffic across a network containing a plurality of discrete network domains. The assembly can include a first management terminal which is arranged to transmit network management traffic to each of the network domains via a respective first communication link, and a second management terminal which is arranged to receive network management traffic from each of the network domains via a respective second communication link. Each of the first communication links can permit a flow of network management traffic from the first management terminal to a respective domain, and prevent a reverse flow of network management traffic from the respective domain to the first management terminal. Each of the second communication links can permit a flow of network management traffic from a respective domain to the second management terminal, and prevent a reverse flow.

Abstract: A communication network traffic control element is disclosed which is arranged to receive traffic, such as voice and data, as a plurality of discrete traffic packets at an input and communicate the traffic as a serial traffic stream to an output. The traffic control element can include a receiver which is arranged to receive the traffic packets, and a processor which is arranged to communicate the serial traffic stream to the output. The processor can include a buffer to vary a traffic output rate from the processor independently of an input rate of traffic flow to the receiver.

Abstract: A network management assembly is disclosed for managing a flow of network management traffic across a network containing a plurality of discrete network domains. The assembly can include a first management terminal which is arranged to transmit network management traffic to each of the network domains via a respective first communication link, and a second management terminal which is arranged to receive network management traffic from each of the network domains via a respective second communication link. Each of the first communication links can permit a flow of network management traffic from the first management terminal to a respective domain, and prevent a reverse flow of network management traffic from the respective domain to the first management terminal. Each of the second communication links can permit a flow of network management traffic from a respective domain to the second management terminal, and prevent a reverse flow.

Abstract: A method is disclosed of applying a non-secure warning tone to a packetized voice signal which includes receiving a voice signal containing a sequence of voice samples; providing a non-secure warning tone signal containing a plurality of tone samples; and modifying the voice signal by selectively including tone samples in the sequence of voice samples.

Abstract: A voice traffic gateway including: a voice traffic input, a voice traffic output, a first domain router, non-secure warning (NSW) tone application apparatus and a signalling filter. The input receives voice traffic including voice messages and signalling messages from a first traffic domain. The output delivers output voice messages and signalling messages to a second, different traffic domain. The first domain router routes voice messages to the NSW apparatus and routes signalling messages to the signalling filter. The NSW apparatus applies a NSW tone to a received voice message to form an output voice message. The signalling filter compares a feature of a received signalling message with a reference feature. The signalling filter will pass a signalling message if the signalling message feature is the same as the reference feature and will block a signalling message if the signalling message feature is not the same as the reference feature.

Abstract: A communications apparatus is disclosed with a first port arranged to receive a first packetised communications signal from a first communications network; a second port arranged to deliver a second packetised communications signal to a second communications network having at least one communications device and to receive a return communications signal from the second communications network; and a call handling controller arranged to pass a received packetised communications signal between the first port and the second port.

Abstract: Described herein is a method of controlling call admission for packet switched networks, each network including at least two local area networks (50, 60) and a connecting network (70). The method comprises determining success rates of previous calls from a first local area network to a second local area network and deciding to drop the call attempt based on the success rates of previous calls. In one embodiment, the current packet loss rate for calls from the first local area network to the second local area network is also determined, and the decision to drop the call attempt is based on that current packet loss rate. Additionally, the decision to drop the call attempt may be based on both the current packet loss rate and the success rates of previous calls.

Abstract: A voice traffic gateway including: a voice traffic input, a voice traffic output, a first domain router, non-secure warning (NSW) tone application apparatus and a signalling filter. The input receives voice traffic including voice messages and signalling messages from a first traffic domain. The output delivers output voice messages and signalling messages to a second, different traffic domain. The first domain router routes voice messages to the NSW apparatus and routes signalling messages to the signalling filter. The NSW apparatus applies a NSW tone to a received voice message to form an output voice message. The signalling filter compares a feature of a received signalling message with a reference feature. The signalling filter will pass a signalling message if the signalling message feature is the same as the reference feature and will block a signalling message if the signalling message feature is not the same as the reference feature.

Abstract: Described herein is a method of controlling call admission for packet switched networks, each network including at least two local area networks (50, 60) and a connecting network (70). The method comprises transmitting a burst 5 of trial data of the same size as the packet to be transmitted from a first node (52, 54) in a first local area network (50) to a second node (62, 64) in a second local area network (60) via the connecting network (70). The connecting network (70) comprises a plurality of routing nodes (72, 74, 76, 78, 80) for muting the burst of trial data of the same size as the packet to be transmitted from a first node (52, 54) in a first local area network (50) to second node (62, 64) in a second local area network (60) via the connecting network (70). The connecting network (70) comprises a plurality of routing nodes (72, 74, 76, 78, 80) for routing the burst of trial data to the second node in the second local area network along a particular path.

Abstract: Described herein is a method of controlling calls for packet switched networks, each network including at least two local area networks (50, 60) and a connecting network (70). The method comprises the steps of determining an acceptable packet loss rate for a call to be established between two of the local area networks, comparing actual packet loss rate to the acceptable packet loss rate, and dropping the call if the actual packet loss rate is greater than the acceptable packet loss rate determining for how long a period the actual packet loss rate has been happening and utilising that period in deciding to drop the call. A recorded announcement may be played when the call is to be dropped. Alternatively, the priority of the transmission of the continuous stream of data can be changed when the actual packet loss rate is not acceptable and the above steps are repeated. Ideally, data relating to dropped calls is stored for future use.